Patent classifications
E
FIXED CONSTRUCTIONS
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E02
HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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E02F
DREDGING; SOIL-SHIFTING
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3/00
Dredgers; Soil-shifting machines
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E02F3/46
with reciprocating digging or scraping elements moved by cables or hoisting ropes; ; Drives or control devices therefor
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E02F3/475
for making foundation slots
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